Pump.



H. LEMP.

PUMP.

APPLICATION FILED MAR.26.1913.

Patented Nov. 24, 1914.

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Patented Nov. 2d, 119ML.

Applicetion tiled March te, 1913. termi luc. 75,37.

Tool? whom it may concer/vi lle it lmovvn that l, HERMANN Lenie, a citizen 'of the United States, residing at Erie, in the county of Erie, State et Pennsylvania, have invented certain new and uselhil lmprovements in Pumps, ci which the following is a speciication.

The present invention relates to pumps and more especially to those intended tor supplying fuel under high pressure to internal combustion engines operating on the hi h compression plan.

' he obgect ot my invention is to provide a pum et simple construction and one which is capable of being easily regulated to vary the output from maximum to minimum, and vice versa, in accordance with the demand for J`iuel.

For' e consideration oit iwhat ll believe to be novel and my invention, attention is' directed to the accompanying description and clainis appended thereto. n

ln the accompanying drawing, *which illustrates one of the embodiments ot" my invention, higiu'e 1 isa longitudinal motion of a pump; 'Fig'. 2 is a detailed vieyv shovvim, thearian ement ot the ports admitting dui tothe cylinder on the suction stroke; Fig. 3 is aeection tahen on the line 3-3 of Fig. 2, ond Fig. l is a longitudinal section oil o slight modiiication ot the pump cylinder.

' 5 indicates the pum casing which is secured to u support 6 o any suitable character, sucln'tbr example, as the trame of au internal combustion engine. The casin ie cored outy to torni n chamber 'i' to which tuel is admitted by the passage il troni an elevated tank or other source oit' sup ly. The

casing is provided with a central re, and located therein is a lining ll forminga a pump barrel which is provided with a angeblslioulder at its lower eind that engages vvith an internal shoulder toi-med on the casing. 'lhe lining or pump barrel has a central bore ot unitorm diameter throughout its length. ln the lower part ot the lining is mounted a cylinder 10 which is made as hard as f sible to reduce Wear.' lin. the upper enol the cylinder. are .'lormed'ports 11 throut which huid freely dows trom the lining ports lllai'id chamber 7 when said cvlinder ports ure' uncovered by the The cylinder is also provide wit a :i i or shoulder l2 that on the shoulder on to the lining. The cylinder and lining are held um plunger.

in place by the coiled compression spring 413 that rests on the head 14 which is screwthreaded to the casi The lower end of the cylinder 10 is roiii pressure actuate discharge valve 15. This valve is normally held on its seat by a coiled com ressionspring 16. In order to decrease the iability of the pump failing to operate by reason of faulty operation oit' the high pressure discharge valve l provide two such valves 15 and 17 and arrange them in series. The valves are similar in construction, all being hollow to reduce the weight and are held against their seats by springs 16. lin the head is a iittiii 18 contanin a passa communicating Wit the pipe 19 t at exten to the fuel inJector or pulverizer supplying fuel to the combustion ace of the engine.

Located inside of the lining or ump barrel 9 is a plunger 20, the lower end) of which is somew at reduced in diameter so as to make u good workin fit with the bore of the cylinder 10. This plunger is also hardened to reduce Wear. The upper part of the plunger is guided by the lining 9. The ltop of the plunger is provided with a head 21 having a rounded upper surface, and resting thereon is a plug 22 having a Hat under tace. This' arrangement of parts prevents binding or cramping :is the plunger moves up und down. Plug 22 is carried by a cylindrical cross-head 23 which is guided in its movements by the Wall of the pump casing. ln the upper side of the crosshead is mounted a removable plug 24 which is engaged by a roller 25 on the rocker 26. ils the roller is depressed the crossliead 23 und plunger 20 are correspondingly depressed aiid any fluid in the cylinder l0 is displaced und passes through the vulves l5 and 17 into the dischar e pipe 19. In order to lift the plunger a ter it has been depressed by the rocker, o coiled compression spring 27 is provided that rests on the casing at its lower end and enga es a holder 28 at its upper end, said hol er havin a central bore und an .internal shoulder t at engages the head 21 of the plunger.

The rocker 26 is provided with a pivot made in the form of un eccentric 29, which is mounted upon a. shaft 30, the latter being mounted in u suitable bearing 31 carried b the frame 6. The rocker is constantly vibrated with a fixed stroke by the eccen tric 32 which is mounted upon theslinft 33.,

ed with a seat for the inder. into which Huid is free to flow on the suction stroke, a pressure actuated discharge valve, a reciprocating plunger, a spring for withdrawing theA plunger from the cylinder on the su tion stroke, a rocker that forces the plunlger into the cylinder against the action of the spring on the -working stroke, an actuator for the rocker which has a constant length of strokein a fixed region, a pivot for the rocker, a lever for adjusting the pivot to change the region of vibration of the rocker and plunger, and means for lackingA the lever in its various positions.

4. In a pum the combination of a casing, a lining t erefor, a hardened cylinder that is located in a lining into which uid is free to flow on the suction stroke, a spring pressed discharge valvethat is seated in one end of the cylinder, a hardened plun er that displaces the Huid from the cylin er, and means for actuating the plunger.

5. In a pump, the combination of a casing, a ported lming therefor which is of the same bore throughout its len h, ahardened cylinder which is inse in one end of the lining, a sleeve that is inserted in the opposite end of the lining, said cylinder and sleeve having bores of the same diameter and se arated at their ends by a space throu which Huid freely flows into the c lin er through the ort in the lining on t e suction stroke, a unger of uniform diameter that is guide lby the sleeve, a discharge valve, and means for actuating the plungler 6. he combination in a pump, of a member forming a pump barrel, said member having an opening through its side through which fluid is free to How on the suction stroke, a hardened cylinder, inserted in one end of the member, the end of said cylinder terminating adjacent said opening, a hardened lunger for the cylinder which is guided y the pump barrel, and means for operating the plunger.

In witness whereof, I have hereunto set my hand this 24th dag of March 1913.

ERMANN LEMP. Witnesses:

O'rro F. Preussen, EuzAeE'rn CoNNnLL. 

